CT Coronary Angiography is a medical imaging examination with computed tomography (CT-scan). It allows the visualisation of the blood vessels of the heart, called coronary arteries, after injection of iodinated contrast. This is a quick and painless examination.

The only contraindications to this examination are an allergy to iodine and kidney failure. This examination is done preferably by premedication with beta blockers to maintain a low and steady pulse, unless there are contraindications to taking beta blockers.

Coronary angiography remains the reference examination, essential to the diagnosis of possible coronary artery disease: it allows, in fact, highlighting the number, topography and severity of coronary stenosis (blockage or anomaly of the caliber of arteries and their narrowing).

In addition to detecting coronary stenosis or blockages, it allows verification of the permeability impermeability of bypasses and bridges/stents, and examination of coronary and heart anatomy. The role of coronary angiography is not necessary in the accurate assessment of the degree of severity of already known coronary artery disease, but rather in its ability to determine if a severe coronary artery blockage is present or not. It relates to the ability of this examination to eliminate, with virtual certainty, the presence of lesions in the coronary arteries of a patient. Thus, a negative test will reassure you on your risk of stroke in the short and medium term.

The duration of the examination is, in general, about thirty minutes during which the electrocardiogram and blood pressure are continuously monitored.

In conclusion, CT coronary angiography is currently the most efficient, non-invasive technique for exploration of the coronary arteries. This examination is becoming a routine exam that will gradually find its place among the various cardiac explorations.

Examination duration 30 MINUTES

Examinations NOT COVERED by the RAMQ


Take 50 mg of the β-blocker Tenormin on the eve (evening) and 4 hours before the examination, as prescribed by your physician. Do not take cardiac stimulants 12 hours before the examination and do not smoke. Fast four (4) hours before the examination. Do not exercise 24 hours before the examination.

Do not take medications against erectile dysfunction (e.g.: Viagra, Cialis) at least 24 hours before the examination.

If you are a type 2 diabetic, do not take Glucophage or Metformin the morning before the examination.